Where does “coriera” come from?

coriera (Mòcheno) comes from Italian corriera, from Italian correre, from Latin currō, from Proto-Indo-European ḱer-, from Proto-Indo-European kr̥-, from Proto-Indo-European ker- — army.

coriera (Mòcheno): bus

Definitions

Ancestry of “coriera”, step by step

Step	Language	Word	Meaning
1	Italian	corriera	coach, bus
2	Italian	correre	to run; to hurry, rush
3	Latin	currō	to run
4	Proto-Indo-European	ḱer-	to grow, to make grow, to nourish; to plait,...
5	Proto-Indo-European	kr̥-	to turn, to bend
6	Proto-Indo-European	ker-	army

Every word from Proto-Indo-European ker- →Every word from Proto-Indo-European kr̥- →Every word from Proto-Indo-European ḱer- →